Vacuum milk-can.



ST. VRAIN LE SIEUR.

VACUUM MILK CAN.

APPLICATION FILED APR.19, 1912 RENEWED DEC. 8. 1913.

Patented Dec. 8, 1914.

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CORPORATION OF ILLINOIS. i

OF EAST ST. LOUIS, ILLINOIS, A

Specification of Letters Patent.

Patented Dec. 8, 1914..

Original application filed September 5, 1911, Serial No. 647,719. Divided and this application filed April 19, 1912, Serial No. 691,930. Renewed December 8, 1913. Serial No. 805,348.

To all whom it may concern Be it known that I, ST. VRAIN Ln Smun, a-citizen of the United States, and resident of East St. Louis, St. Clair county, Illinois, have invented certain new and useful Improvements in Vacuum Milk-Cans, of which the following is a specification, containing a full, clear, and exact description, reference being had to the accompanying drawings,

forming a part hereof.

My invention relates to improvements in vacuum milk cans, and it consists in the novel construction and combination of parts hereinafter set forth and pointed out in the appended claims.

The object of my invention is to provide an improved vacuum milk can for use in shipping and storing milk and cream and preserving the contents against fermenta- {$11011 and other deleterious effects caused by eat. 5 v

I A further object is' to provide a vacuum milk can which will be strong, durable, and cheap in construction, and which will be highly eflicient and convenient in operation. In the drawings: Figure 1 is a sectional elevation of a milk can having my invention applied thereto; and Fig. 2 is a detail, sectional elevation of a portion of the upper end of the can.

This application is a division of my rior application filedSeptember 5, 1911, erial No. 647,719. i

The numeral 1 indicates the outer can, and 2 the inner can, the two cans being separated by a space 3 from which the air is exhausted.

' It is very important, in a vacuum milk can, that the inner can be insulated from the outer can, toprevent the conduction and radiation of heat from the external can to the internal can, and in carrying out my inlimited the illustration herein to the details of the necks and cover.

The upper ends of the necks 5 and 6, of the outer and inner cams respectively, are held apart by a ring 7 of wood or similar non-conductive material, and upon the upper edge of said ring is placed a body of common cement 8, and .a rubber ring 9 is mounted upon said body of cement and the upper edges of said necks are each turned inwardly and brought forcibly down upon said rubber ring, so that a portion of said rubber ring will project upwardly between the adjacent in-turned portions of the said necks and form a gasket 'for the cover to rest upon. a y

' The can is provided with the usual form of handles 10. Y v

The numeral ll-indicates a vacuum cover in the form ofa hollow cylindrical body from which the air is exhausted. Said cover Formed in the lower end of the cover 11 is I a conical depression 13 in which is concealed and protected a common needle-valve 14, the outer end of the needle of which is adapted to beengaged by a common wrench or key, for the purpose of opening or closing said needle valve, in the operation of exhausting the air from the vacuum chamber of saidcover. Said needle-valve is adapted to have connected to it in the usual way a hose (not shown) leading from any suitable vacuum pump or exhauster, to exhaust the air from said vacuum chamber. The said needle-valve 14 is concealed and protected within said conical depression 13 by means of a metal plate 15 removably fixed, by means of solder, on the lower end of said cover. a.

As I make no claim in the present a plication to means for exhausting the airrom the space between the outer and inner cans, I have notshown a needle-valve for the said' space, fiiili will say that in practice'aiiother and separate needle-valve is provided for said space, as shown and described in my need not be described in detail, asthey are not claimed herein specifically, but are specifically described and claimed in my prior application previously referred to.

The operation of my invention is obvious and need not be described further in details,

except to say that milk placed within the inner can, at a lower temperature than the external aperture, will retain its temper ature with but slight variation for a considerable period, since the space 3 presents a guard or protecting medium of an indifferent heat-conducting quality.

Milk cans constructed as described will be specially valuable in trans ortation, as they will serve to keep the mi in a fresh and cool condition throughout and after the period of transit. The wood ring 7 greatly strengthens the neck of the can.

I claim: y 1. The improved milk can, comprising the outer and inner cans separated by a space from which the air is to be exhausted,

necks for said cans, a wood ring located in the space between said necks, a body of cement also in said space on the upper surface of said wood ring, a compressible gasket also in said space above said body of cement, and the upper edges of the said necks turned inwardly to forcibly contact with said compressible gasket leaving a portion of the gasket free between said inturned edges, a suitable cover, and means for clamping said cover in position upon said gaskets 2. The iniproved vacuum milk-can, comprising an outer can and an inner can separated by a space from which the air is exhausted, a suitable gasket located in the space between said outer and inner cans, at theu'pper ends of the latter and forming a non-metallic connection between the upper ends of said cans, and also acting as a -gasket to hermetically seal a cover in position upon said gasket, and a vacuum-cover having a space from which the air is exhausted and hermetically sealed in position upon the ST. VRAINLE SJEEsI a;

Witnesses:

E. L. Won, dorm O. HIGDON.,- 

